Laser patterning for reel-to-reel production of organic photovoltaic (OPV) devices

The direct write and non-contact nature of laser patterning is highly desirable as it is compatible with integration in roll-to-roll production lines. The reduced thermal effects of ultrafast lasers are key to obtain selective removal of sensitive, thin film layers (<0.2 mu m). In this work, diode-pumped solid state (DPSS) picosecond and femtosecond pulse duration lasers are compared to identify the laser parameters and conditions required to produce high efficiency organic photovoltaics.